CN211823995U

CN211823995U - Heat pipe capable of synchronously controlling auxiliary phase change

Info

Publication number: CN211823995U
Application number: CN202020184931.2U
Authority: CN
Inventors: 姚永明; 倪庆海
Original assignee: Jiangsu Gaoke Applied Science Research Institute Co ltd
Current assignee: Jiangsu Gaoke Applied Science Research Institute Co ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2020-10-30
Anticipated expiration: 2030-02-19

Abstract

The utility model discloses a heat pipe of supplementary phase transition of synchronous control, including the inside tube that is formed with the closed cavity, the tube includes evaporation zone, condensation segment and adiabatic section, is equipped with imbibition core and heat transfer medium in the closed cavity, is equipped with a plurality of semiconductor refrigeration pieces in the imbibition core in the adiabatic section, and the both ends of semiconductor refrigeration piece set up respectively in evaporation zone and condensation segment. The utility model discloses a set up the semiconductor refrigeration piece in adiabatic section, and set up the both ends of semiconductor refrigeration piece in evaporation zone and condensation segment respectively, when the operating temperature of heat pipe is not when the name operating temperature within range, semiconductor refrigeration piece work, the cold junction of semiconductor refrigeration piece is followed the heat pipe condensation segment and is absorbed heat, supplementary heat transfer medium condensation, the hot junction of semiconductor refrigeration piece is exothermic in the heat pipe evaporation segment, reinforce the evaporation of heat transfer fluid, ensure that the heat transfer fluid can both realize the phase transition in whole operating temperature within range in the heat pipe, thereby keep the high-efficient heat transfer that lasts, make the critical heat flux density of heat pipe obtain improving.

Description

Heat pipe capable of synchronously controlling auxiliary phase change

Technical Field

The utility model belongs to the technical field of heat exchange device, concretely relates to heat pipe of supplementary phase transition of synchronous control.

Background

The heat pipe is mainly composed of a sealed metal pipe body, a capillary core structure in the sealed metal pipe body and heat transfer fluid filled in the metal pipe body, and proper vacuum degree is kept in the metal pipe body so as to reduce the starting temperature difference of the heat pipe. The evaporation end part (Evaporator) of the heat pipe is arranged on the heat source, so that the heat generated by the heat source evaporates the fluid (liquid phase) in the pipe to absorb heat (latent heat) and vaporize (vapor phase), the generated vapor is driven to flow to the condensation part (condensor) of the heat pipe by the vapor pressure difference, the vapor releases the latent heat in the condensation part, namely, is condensed and recovered to the liquid phase, and then is driven by capillary force to return to the evaporation part through the capillary wick structure, namely, the heat is rapidly conducted out through the structure.

Heat pipes have long been used in heat recovery or other different heat exchange applications due to their simple construction and their high conductivity and low thermal resistance. However, the heat pipe is a heat transfer element which transfers heat by means of the phase change of the working liquid in the heat pipe, and the phase change condition is controlled by the pressure and the working temperature of the fluid filled in the heat pipe. On the other hand, the operating temperature is variable, and therefore, improving the performance of the heat pipe should ensure that the fluid inside the heat pipe can achieve phase change within the whole operating temperature range. However, the existing heat pipe product cannot ensure that the fluid in the heat pipe can realize phase change in the whole working temperature range.

Therefore, how to provide a heat pipe, which can maintain high heat transfer efficiency in the working temperature range, is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a synchronous control assists heat pipe of phase transition, can guarantee in the heat pipe that heat transfer fluid can both realize the phase transition in whole operating temperature range to keep the high-efficient heat transfer that lasts.

The technical scheme is as follows: in order to realize the purpose of the utility model, the utility model discloses a technical scheme as follows: a heat pipe capable of synchronously controlling auxiliary phase change comprises a pipe shell, wherein a closed cavity is formed in the pipe shell, the pipe shell comprises an evaporation section, a condensation section and a heat insulation section arranged between the evaporation section and the condensation section, a liquid absorption core and a heat transfer medium are arranged in the closed cavity, a plurality of semiconductor refrigeration sheets are arranged in the liquid absorption core in the heat insulation section, two ends of each semiconductor refrigeration sheet are respectively arranged in the evaporation section and the condensation section, and when the temperature outside the evaporation section or the condensation section is not enough to respectively cause the evaporation phase change and the condensation phase change of the heat transfer medium in the evaporation section and the condensation section, the semiconductor refrigeration sheets are electrified to work, so that the heat transfer medium in the evaporation section and the condensation section is kept in a nominal working range.

Furthermore, heat conduction fins are arranged at two ends of the semiconductor refrigeration piece and are in a long strip shape, and the heat conduction fins extend to the outer ends of the evaporation section and the condensation section respectively.

Furthermore, the cross section of the pipe shell is circular or rectangular.

Furthermore, the liquid absorption core is tightly attached to the inner wall of the pipe shell.

Furthermore, a liquid injection port communicated with the closed cavity is arranged on the pipe shell.

Further, the heat transfer medium includes ammonia, ethanol, freon, and water.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses a set up the semiconductor refrigeration piece in adiabatic section, and set up the both ends of semiconductor refrigeration piece in evaporation zone and condensation segment respectively, when the operating temperature of heat pipe is not when the name operating temperature within range, semiconductor refrigeration piece work, the cold junction of semiconductor refrigeration piece is followed the heat pipe condensation segment and is absorbed heat, supplementary heat transfer medium condensation, the hot junction of semiconductor refrigeration piece is exothermic in the heat pipe evaporation segment, reinforce the evaporation of heat transfer fluid, ensure that the heat transfer fluid can both realize the phase transition in whole operating temperature within range in the heat pipe, thereby keep the high-efficient heat transfer that lasts, make the critical heat flux density of heat pipe obtain improving.

Drawings

FIG. 1 is a schematic structural diagram of a heat pipe according to an embodiment of the present invention;

fig. 2 is a schematic sectional view taken along the line a-a in fig. 1.

Detailed Description

The present invention will be further clarified by the following embodiments, which are implemented on the premise of the technical solution of the present invention, and it should be understood that these embodiments are only used for explaining the present invention and are not used for limiting the scope of the present invention.

As shown in fig. 1 and 2, the heat pipe for synchronously controlling auxiliary phase change comprises a pipe shell 1 with a closed cavity 3 inside, a liquid absorption core 4 arranged in the pipe shell 1, a heat transfer medium filled in the closed cavity 3 at a certain pressure, and a plurality of semiconductor cooling fins 5.

In particular, the cartridge 1 is a closed hollow shell, whose cross-section may be circular, rectangular or other. The pipe shell 1 can also be provided with a liquid injection port communicated with the closed cavity 3, and the closed cavity 3 is vacuumized and injected with heat transfer media through the liquid injection port. The closed cavity 3 has a certain vacuum degree, and the vacuum degree can be determined according to the type and the boiling point temperature of the heat transfer medium which are actually required. The heat transfer medium can adopt ammonia, ethanol, Freon (R21, R22, R113 and the like) or water, and the boiling point temperature can be determined according to the nominal working temperature of the heat pipe, so that the type of the heat transfer medium is determined. The wick 4 is preferably arranged in close proximity to the inner wall of the housing 1. Generally, the heat transfer medium is evaporated by absorbing heat at one end of the tube case 1 and then condensed by releasing heat at the other end, a section where the heat transfer medium is evaporated into a gas is referred to as an evaporation section 2, a section where the heat transfer medium is condensed into a liquid is referred to as a condensation section 6, and an adiabatic section 7 is disposed between the evaporation section 2 and the condensation section 6. The heat transfer medium condensed into a liquid state in the condensation section 6 flows back to the evaporation section 2 from the wick 4 by capillary action. A plurality of semiconductor refrigeration pieces 5 are arranged in a liquid absorption core 4 in a heat insulation section 7, two ends of each semiconductor refrigeration piece 5 are respectively arranged in an evaporation section 2 and a condensation section 6, and then when the semiconductor refrigeration pieces 5 are electrified to work, the temperature of heat transfer media in the evaporation section 2 and the condensation section 6 can be adjusted simultaneously.

In order to improve the temperature adjusting effect of the heat transfer medium, heat conducting fins 8 are arranged at two ends of the semiconductor refrigerating sheet 5, the heat conducting fins 8 are preferably long strips, and the heat conducting fins 8 at the two ends extend to the outer ends of the evaporation section and the condensation section respectively.

When the heat pipe is used, temperature sensors are arranged on the outer sides of the evaporation section 2 and the condensation section 6 to measure the temperatures of the outer sides of the evaporation section 2 and the condensation section 6 respectively, when the temperature of the outer sides of the evaporation section 2 or the condensation section 6 is not within a nominal working range, the semiconductor refrigeration piece 5 is electrified to work, the temperature of the end part of the semiconductor refrigeration piece 5 positioned in the direction of the evaporation section 2 is increased to become a hot end, the heat of the semiconductor refrigeration piece heats the heat transfer medium in the liquid absorption core 4 through the heat conduction fin 8 of the hot end, the heat transfer medium is heated together with the heat absorbed by the evaporation section 2 of the heat pipe from the outside, the heat transfer medium is evaporated to absorb heat (latent heat) and is vaporized (vapor phase), and the generated vapor is. Meanwhile, the temperature of the end part of the semiconductor refrigeration piece 5, which is positioned in the direction of the condensation section 6, is reduced and becomes a cold end, the heat conduction fins 8 at the cold end absorb the heat of the heat transfer medium in the liquid absorption core 4, the heat transfer medium steam is enhanced to release latent heat in the condensation section 6, namely, the heat is condensed and recovered to a liquid phase, and then the heat transfer medium is driven by capillary force to return to the evaporation section 2 through the liquid absorption core 4, so that the heat transfer medium in the evaporation section 2 and the condensation section 6 is kept in a nominal working range, and further, the phase change of the heat transfer fluid in the heat.

When the heat pipe needs reverse heat transfer, reverse current is applied to the semiconductor refrigerating sheet 5, and the original hot end of the semiconductor refrigerating sheet 5 becomes the cold end and the original cold end becomes the hot end.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a heat pipe of supplementary phase transition of synchronous control, includes that inside is formed with the tube of closed cavity, the tube includes evaporation zone, condensation segment and sets up the adiabatic section between evaporation zone and the condensation segment, be equipped with imbibition core and heat transfer medium in the closed cavity, its characterized in that: the heat insulation section is characterized in that a plurality of semiconductor refrigeration pieces are arranged in the liquid absorption core in the heat insulation section, two ends of each semiconductor refrigeration piece are respectively arranged in the evaporation section and the condensation section, and when the temperature of the outer side of the evaporation section or the outer side of the condensation section is not enough to respectively cause evaporation phase change and condensation phase change of a heat transfer medium in the evaporation section or the condensation section, the semiconductor refrigeration pieces are electrified to work, so that the heat transfer medium in the evaporation section and the heat transfer medium in the condensation section are both kept in a nominal working range.

2. A heat pipe with synchronously controlled assisted phase change as claimed in claim 1, wherein: the both ends of semiconductor refrigeration piece all are equipped with heat conduction fin, heat conduction fin is rectangular form, and its outer end setting that stretches to evaporation zone and condensation zone respectively.

3. A heat pipe with synchronously controlled assisted phase change as claimed in claim 1, wherein: the cross section of the pipe shell is circular or rectangular.

4. A heat pipe with synchronously controlled assisted phase change as claimed in claim 1, wherein: the liquid absorption core is tightly attached to the inner wall of the pipe shell.

5. A heat pipe with synchronously controlled assisted phase change as claimed in claim 1, wherein: and the tube shell is provided with a liquid injection port communicated with the closed cavity.

6. A heat pipe with synchronously controlled assisted phase change as claimed in claim 1, wherein: the heat transfer medium comprises ammonia, ethanol, freon or water.